[fix] autocomplete empty input request

[upteran]

Description

• add check before request send
• add little animation on input error (thought it not form with huge list of inputs, can use some animation)
• add tests and fix parser old test (some of them were fail)

Related Issue

Closes #770

Context

I've seen few options to fix this:

• add check to handler in component (with/without animation)
• add required attr to autocomplete input (mean this one), it's easier and native, but in diff browser we'll get different design of tooltips. And I thought in this case we can use more complex solution and get animation and controlled view

Check pls and if animation is not need, I can replace it with required attr or another way you prefer )

Screenshots:

[pastelsky]

Love the little shake! Thanks.